Jonathan Bowling, MBChB FRCP Consultant Dermatologist, Oxford, UK. John Paoli, Ph.D. Professor, Department of Dermatology and Venereology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg; and Consultant Dermatologist, Sahlgrenska University Hospital, Gothenburg, Sweden. Alex Chamberlain, MB BS (Hons) FACD Adjunct Senior Lecturer, Central Clinical School, Monash University; and Specialist Dermatologist, Victorian Melanoma Service, Alfred Health, Prahran, Victoria, Australia.